HealthCareAtlasUSA

This site republishes official CMS/Medicare Care Compare data. It is not medical advice and does not recommend any specific hospital or treatment — for medical decisions, talk to a doctor.

Doctors / CA

MATTHEW GREGORY NIEMI, MD

DIAGNOSTIC RADIOLOGY

Graduated: 2000

NPI: 1114904539

Practice Locations (2)

ERNST RADIOLOGY CLINIC, INC

26 CAMEO WAY

SAN FRANCISCO, CA 941311634

3147709393

PERMANENTE MEDICAL GROUP INC

2500 MERCED ST

SAN LEANDRO, CA 945774201

5104541000

Source: CMS National Downloadable File, September 2026.

MATTHEW NIEMI, MD | HealthCareAtlasUSA